Examlex
In not more than three lines for each answer, briefly outline one important scientific contribution of each of the following.
a) Planck
b) De Broglie
c) Heisenberg
Pollen Tube
In gymnosperms and flowering plants, a tube or extension that forms after germination of the pollen grain and through which male gametes (sperm cells) pass into the ovule.
Pollinated
The transfer of pollen from the male anthers of a flower to the female stigma of the same flower or another flower, leading to fertilization and the production of seeds.
Scentless
Lacking a detectable smell or odor.
Pollen
Fine to coarse powder containing the microgametophytes of seed plants, which produce male gametes (sperm cells) for fertilization.
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